JP2010284366A - Stretcher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stretcher capable of being safely and rapidly placed on or let down from an ambulance car by providing a durable elastic member to the movable part of the front leg part of the stretcher and capable of being simply and quietly regulated in its height when a patient is housed in the stretcher or transferred to a bed. <P>SOLUTION: A spring member 22 is provided between the movable part of the front leg auxiliary frame from the upper end part of the upper frame 11 of the stretcher and the movable part of the front leg auxiliary frame and a front leg frame. A spring cover 25 is mounted on the spring member when the spring member is provided not only to prevent the sound emitted during expansion and contraction of the spring member or the sound emitted when the spring member collides with the frame or horizontal U-shaped center rail 14 of the stretcher by the elastic force of the spring member but also to prevent clothing or ambulance cloth from being got between the movable parts during ambulance work. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a stretcher for transporting an emergency patient or a sick person, and in order not to give an impact to the emergency patient or the sick person, the stretcher is gently moved up and down to easily adjust the height. It can be related to a stretcher.

  The stretcher placed on an ambulance for transporting an emergency patient is placed on the ambulance by folding the front and rear legs of the stretcher. In particular, since it is urgent, the folding structure of the leg is required to be a structure that allows the leg to be easily opened and folded when being put on or taken down from an ambulance. In addition, because it is used to transport critically ill patients and emergency patients, the structure for adjusting the height of the stretcher when the patient is put on an ambulance can be moved gently so as not to cause pain and anxiety to the patient. A structure is required. In addition, there are various places where emergency patients can be placed and lowered, and a mechanism that can quickly adjust the height of the stretcher cradle to an appropriate position is required.

  From the left column of the fifth column on page 5 of Patent Document 1, “the rear leg 14 returns to its raised position due to gravity. The sliders 31 and 29 of the front leg and the front brace are connected by a tension spring 114, and the spring is a beam 56. Is passed around a roller 115 that is pivotally attached to the front end of the spring.The spring 114 pulls the sliders 31 and 29 forward toward the stops 94, respectively. "

  One spring is connected to the front leg of the stretcher of Patent Document 1. One end of the spring is attached to the slider 31, passes around a roller 115 rotatably attached to the front end, and the other end is connected to the slider 29. On page 6, right column, line 30, slider 31 is “a device for attaching the upper end of the front leg so that it can rotate and slide in the vertical direction”, and on line 28, right column, slider 29 “ "A device for attaching the upper end of the brace so as to be slidable and rotatable". That is, in the front leg of the cited document 1, one end of one spring is connected to the front leg and the other end is connected to the front brace, and a roller is attached therebetween.

  The stretcher of Patent Document 2 is characterized in that, in claim 1, “a support structure attached to a height-adjustable frame structure including a first and a second pair of foldable legs, and a height of the support structure is adjusted. An undercarriage comprising actuating means for performing said actuating means, said actuating means comprising: first and second pairs of foldable legs; and coupling means connected to said support structure; Is an undercarriage that can be retracted or extended to extend or fold the first and second pair of legs to adjust the height of the support structure. " The means for moving the stretcher up and down is (second page, upper column, second row on page 3) “Because the flexible coupler is energized so as to wind around each spool, the spool is appropriately under spring tension. Each spool has a ratchet mechanism that allows the flexible coupler to be unwound from the spool when the ratchet mechanism is disengaged so that the support structure is lowered. " It has become. In order to unwind the flexible coupler from the spool (Patent Document 2, page 4, left column, lower row, third row) "The ratchet mechanism uses a serrated cogwheel gear fixed to the shaft of the spool. And the rotation of the spool is prevented by a claw member that meshes with the saw teeth, as shown in FIG.

  Furthermore, the stretcher disclosed in Patent Document 3 is claimed in claim 1 as “a main stretcher leg standing mechanism composed of a gas damper with a lock and a slide shaft pressing plate”. As shown in Fig. 1, the lock-and-slide carrier assembly is fixed with a gas damper with a lock, and a pair of slide shaft pressing plates are fixed with an eye beam. The slide shaft pressing plate is fixed to the lock and slide carrier assembly. ”

  The stretcher placed on the ambulance is designed to stably place the emergency patient on the stretcher and quickly put it on the ambulance and take it down without giving pain and anxiety to the emergency patient on the stretcher. A structure is needed. Therefore, various studies as described above have been added.

  In order to adjust the height of the stretcher, as shown in FIG. 11, in Patent Document 1, one end of one spring (a) is connected to the front leg and the other end to the front brace, and a roller (b ) Is installed. As described above, since the middle portion of the spring is bent so as to be bent by the roller (b), there are problems such as limitation of the thickness and strength of the spring. Further, since the spring (a) is used to be bent by the roller (b), there is a problem that the spring (a) breaks from a portion in contact with the roller (b).

  The means for moving the stretcher of Patent Document 2 up and down is performed by a coupler biased so as to be wound around a spool, and the spool is made of a woven fabric that is appropriately maintained under a spring tension. Therefore, there were problems with the strength and durability of the woven fabric.

Further, the gas damper of Patent Document 3 has problems in long-term use, strength during height adjustment, and the like. In this way, with regard to the mechanism for adjusting the height by sliding the leg of the stretcher, the emergence of a highly safe stretcher that has little vibration and can be operated reliably by emergency personnel. It is desired.
Japanese Patent Publication No. 56-53377 JP 7-504838 Utility Model Registration No. 3058160

  The present invention attaches a durable elastic member to the movable part of the front leg of the stretcher so that the stretcher can be safely and quickly placed on an ambulance, can be lowered, and can accommodate a patient, It is an object of the present invention to provide a stretcher that can easily and quietly adjust the height of the stretcher when moving to the position.

  As a result of various studies in view of the above facts, the present inventor has attached spring members to the front leg auxiliary frame of the front leg part of the stretcher and the movable part of the front leg frame. By attaching a spring cover to the spring member when the spring member is installed, it is possible to eliminate the sound generated when the spring expands and contracts. Furthermore, the elastic force of the spring can prevent the spring from striking the stretcher frame or the U-shaped center rail and making a sound, and can prevent clothing, emergency cloth, etc. from being caught during the emergency work.

  A feature of the present invention is that a rectangular frame-shaped upper frame, an inner frame is attached to the inner side of the upper frame, a center rail having a U-shaped cross section in the inner frame, and a sliding tube on one side of the center rail A slide tube having a lock groove on the other side, and a front leg auxiliary frame pin lock mechanism, a front leg frame pin lock mechanism, and a rear leg auxiliary frame pin lock mechanism for expanding and fixing the leg portion to the slide pipe. A front leg frame that has a front leg auxiliary frame, a caster at the lower end, and a rear leg auxiliary frame are rotatably attached to the pin lock mechanism, and the inner frame rotates to the lower end. A rear leg frame having a free caster is rotatably attached, the front leg frame is expandable forward and rearward, and the rear leg frame is expandable rearward, the front leg F It is stretcher, characterized in that clamped by the spring member in at least two places of the upper end pivot portion of the upper rotating section and the front leg auxiliary frame over arm.

  At least two spring members are attached to the front leg auxiliary frame or the front leg frame with spring members having different outputs or the same output spring members. In this way, the position where the spring member is attached includes the spring member attached to the front leg auxiliary frame and the spring member attached to the front leg frame, and a spring member having the same output is attached to both of them. Alternatively, spring members having different outputs are installed. Spring members with different outputs refer to spring forces including tensile strength (tension) and pull back force, and spring members with different outputs refer to different spring forces including pull strength (tension) and pull back force. . When spring members having different outputs are attached to the front leg auxiliary frame and the front leg frame, it is said that spring members having different outputs are attached. In addition to the front leg auxiliary frame and the front leg frame, a spring member can be attached to the rear leg auxiliary frame. The spring member attached to the rear leg auxiliary frame preferably has the same output as the spring member of the front leg frame.

  Another feature of the present invention is a stretcher characterized in that the spring members attached to at least two places are spring members to which a spring cover is attached.

  The spring members attached at least at two locations are spring members to which spring covers are attached. The spring cover may be attached by attaching a metal pipe to the U-shaped center rail and passing the spring member through it, but letting the spring member pass through the synthetic resin tube. Alternatively, the spring member may be directly covered with a tube to form a spring cover. The mounting method of the spring cover is not particularly limited. The spring member to which the spring cover is attached may be installed not only from the front leg part, but also from the upper end movable part of the rear leg auxiliary frame to the upper part of the rear leg frame.

  The spring cover may be a metal pipe, but it is preferably made of a synthetic resin that is light and does not apply a load to the spring member so that the inside can be seen. The tube made of synthetic resin may be a hard tube or a soft tube with flexibility. Examples of the material of the tube include Teflon (registered trademark), nylon, urethane, silicon, vinyl chloride, synthetic rubber, natural rubber and the like, but a tube having cold resistance and weather resistance is desirable, but the material of the spring cover is not particularly limited.

  Another feature of the present invention is that a fixed brake for fixing the wheel of the caster is installed on the link operating unit from the top of the rotatable caster installed on the lower end of the rear leg frame, and the upper frame is installed at the lowermost part. 2. A brake button of a fixed brake projecting on the upper frame and the link operating portion comes into contact with each other, and the upper frame presses the brake button to apply a brake to the rotatable caster. Or it is a stretcher in any one of Claim 2.

  The lower end portion of the rear leg frame and one end portion of the support arm are pivotally attached to the link operating portion, and a rotatable caster wheel is attached to the lower portion of the link operating portion. When the brake that fixes the wheels of the casters that can rotate through this link operating part is installed and the upper frame of the stretcher is at the lowest position, the upper frame and the brake button of the fixed brake come into contact, and the upper frame This is a safe stretcher that presses the brake button to apply the brakes to the pivotable casters so that you do not forget to apply the brakes.

  Another feature of the present invention is a trapezoidal concave fitting groove for fixing the head side of the stretcher to the front end of the stretcher and a hook-like hook for fixing the foot side of the stretcher to the rear end of the stretcher It is a stretcher characterized in that a stopper having the above is installed. A trapezoidal concave fitting groove is provided at the front end of the stretcher base, and a trapezoidal convex fitting part that fits into the fitting groove is mounted on the head side of the stretcher placed on the stretcher. As a result, simply placing the stretcher on the stretcher pedestal and pushing it from the rear, the convex fitting part attached to the head side of the stretcher hits the concave fitting groove on the stretcher. The stretcher fits the recess in the stretcher groove and the stretcher in the stretcher while the trapezoidal convex fit is sliding along the concave trapezoidal slope. Can be firmly held on the frame.

  Another feature of the present invention is the stretcher characterized in that the fitting groove for fixing the stretcher attached to the front end of the stretcher has a trapezoidal concave shape having a slope. Even if the stretcher is slightly skewed on the upper frame of the stretcher, even if the stretcher has a trapezoidal concave shape on the tip of the stretcher, the convex fit that has the slope of the stretcher The part advances while sliding along the concave slope of the fitting groove of the stretcher, and the fitting groove of the stretcher and the fitting part of the stretcher are firmly fitted.

  The leg part of the stretcher of the present invention comprises a front leg part comprising a front leg auxiliary frame and a front leg frame, a rear leg part comprising a rear leg auxiliary frame and a rear leg frame. The front leg portion expands forward and rearward, and the rear leg portion expands rearward. The stretcher having the leg portion is characterized in that spring members having spring covers attached thereto are attached to at least two positions of the upper end rotating portion of the front leg frame and the upper end rotating portion of the front leg auxiliary frame. It is a stretcher.

  By attaching a spring member with a spring cover attached to the pivoting part of the front leg auxiliary frame and the front leg frame, there is no bent part due to a roller or the like as compared with the case of using a single spring as in the prior art. A thick, large spring member can be used. By installing a thick and large spring member, durability was increased, and the spread of the legs became quieter. Further, by attaching a spring cover to the spring member, it is possible to eliminate the sound generated when the spring expands and contracts. In addition, the spring's elasticity can prevent the spring from striking the upper frame of the stretcher or the U-shaped center rail, and can also prevent the patient's clothing or medical cloth from getting caught in the spring. be able to.

  A fixed brake that fixes the wheels of the caster is installed on the link operating part from the top of the rotatable caster installed on the link operating part, and when the upper frame is at the bottom, the upper frame and the link operating part are The stretcher is characterized in that the brake button of the fixed brake protruding on the upper surface comes into contact, and the upper frame presses the brake button to brake the rotatable caster.

  The lower end of the rear leg and one end of the support arm are pivotally attached to the link operating part, and a rotatable caster is attached to the lower part of the link operating part. When the brake that fixes the wheels of the casters that can rotate through this link operating part is installed and the upper frame of the stretcher is at the lowest position, the upper frame and the brake button of the fixed brake come into contact, and the upper frame The brakes are pressed on the casters that can rotate by pressing the brake button, making it a safe stretcher that never forgets to apply the brakes.

  A mounting groove is provided at the tip of the gantry, and a mountain-shaped fitting part that fits into the fitting groove of the stretcher is attached to the head side of the stretcher placed on the stretcher. Simply place the stretcher on the stretcher frame and slide it along the trapezoidal recessed groove on the stretcher. Thus, the fitting groove and the fitting portion can be fitted to hold the stretcher firmly. By adopting a trapezoidal concave shape with an inclined surface and a trapezoidal convex shape with an inclined surface as the fitting groove shape, the trapezoidal convex fitting portion has an inclined surface even if the stretcher is slightly skewed on the stretcher. It fits straight along the slope of the trapezoidal concave fitting groove.

The side view which shows the motion of a stretcher and its leg part is shown. A bottom view of the upper frame of the stretcher is shown. The perspective view of a spring member and a spring cover is shown. The side view of the spring member from which length differs is shown. The partial perspective view which attached the bracket to the corner of an upper frame and an internal frame is shown. The top view and side view of the bracket installed in the corner of an upper frame and an internal frame are shown. The top view and side view of the sliding tube and pin lock mechanism of a stretcher are shown. The front view of a pin lock mechanism is shown. The front view of a pin lock mechanism is shown. The side view of the components of the fixed brake of a caster is shown. The partial side view which attached the caster fixing tool to the rear leg caster is shown. The fragmentary perspective view of the bottom face of the stretcher which attached the conventional spring member is shown.

  Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the following examples. In the present invention, when the stretcher is placed on an ambulance or the like, the front end of the stretcher is defined as the front end. That is, the direction where the fixed caster is attached is described as the front end portion. Therefore, when the stretcher is transported down from the ambulance, the rear leg having the rotatable caster is transported in the traveling direction. The head side of the stretcher is the same side as the front end of the stretcher.

  As shown in FIG. 1 (1-1), the stretcher 100 of the present invention has a rectangular frame-like upper frame 11 at the top of the stretcher 100, and is placed on an ambulance at the front lower end of the upper frame 11. A fixed caster 12 is installed so that the ambulance can be smoothly pushed and placed when the ambulance is mounted. An attachment groove mounting portion 26 for receiving a stretcher placed from behind is attached to the front upper end of a center rail 14 (not shown) having a U-shaped cross section. The stretcher fitting part is fitted in the fitting groove fitted to the fitting part 26, and the stretcher front and rear are fixed by the stopper of the stretcher attached to the rear part, so that the stretcher is stably held on the stretcher. The Further, a plurality of internal frames 13 (not shown) are attached to the upper frame 11 having a rectangular frame shape.

  A spring member 22 of the front leg auxiliary frame is attached to the upper part of the front leg auxiliary frame 16 of the stretcher 100 of the present invention. The spring member 22 of the front leg auxiliary frame is attached to the upper end of the front leg auxiliary frame 16 from the front end of the stretcher. When the stretcher is placed on a pedestal such as an ambulance, the front leg auxiliary frame 16 of the stretcher 100 of the present invention is attached to the pedestal A of the ambulance as shown in FIG. The front leg auxiliary frame 16 is pushed down rearward, the front leg part is folded back, and then the rear leg part is folded and placed on the ambulance. When the stretcher on the ambulance base is unloaded from the ambulance, the spring 22 of the extended front leg auxiliary frame retracts and retracts the folded front leg auxiliary frame 16 to reduce the load when the front leg 15 is expanded. .

  A spring member 23 (see FIG. 1 (1-1)) of the front leg frame is attached from the upper part of the front leg auxiliary frame 16 of the stretcher 100 of the present invention to the upper part of the front leg frame 15. As shown in FIG. 1 (1-4), the spring member 23 of the front leg frame expands the front leg 15 outward, and when the height of the stretcher is lowered, the spring member 23 of the front leg frame is extended. When the height of the stretcher is increased, the spring member 23 of the front leg frame contracts to reduce the load when the front leg frame 15 that has been expanded returns to the original position.

  FIG. 1 (1-2) shows that when the stretcher 100 of the present invention is placed on an ambulance, if the stretcher is pushed later while grasping the rear lever 34 of the stretcher (A) The front leg auxiliary frame 16 comes into contact with the corner of the front and pushes the front leg frame 15 backward. Further pushing forward, the rear leg frame 18 is also pushed rearward and placed on the ambulance base in the shape shown in (1-3) of FIG.

  When adjusting the height of the stretcher 100 of the present invention, hold the front lever 33 and the rear lever 34, hold down the upper frame 11 of the stretcher and release the levers 33 and 34 at arbitrary positions. The lock pin 37 is fitted in the lock groove 38 of the pin lock mechanism 30, 31, 32 and is latched at an arbitrary position as shown in FIG. 1 (1-4) (see FIG. 7 for the pin lock mechanism). . If the rectangular frame-shaped upper frame 11 is pressed down without stopping in the middle, it can be fixed at the bottom as shown in FIG. 1 (1-5).

  FIG. 2 shows the back side of the upper frame of the stretcher 100 of the present invention. In FIG. 2, the leg portions of the stretcher are not shown in order to clarify the respective frame configurations. The pipe shape of the rectangular frame-shaped upper frame 11 is not particularly limited, but in the present invention, the upper frame 11 is reinforced by using an elliptical pipe of 29 × 34 mm for the upper frame 11. The fixed caster 12 can be used with a 5-inch wheel, but in the present invention, a 4-inch wheel is installed. The center rail 14 is a rail having a U-shaped cross section of 80 × 40 channels.

  Five internal frames 13 were horizontally placed inside the upper frame 11 of the stretcher 100 of the present invention. A center rail 14 having a U-shaped cross section was attached to the inner frame 13. A slide tube 27 having no lock groove is attached to one side of the center rail 14, and a front leg frame slide tube 28 and a rear leg integrated with a front leg auxiliary frame slide tube having a lock groove formed on the other side. An auxiliary frame sliding tube 29 was installed. A pin lock mechanism 30 for the front leg auxiliary frame, a pin lock mechanism 31 for the front leg frame, and a pin lock mechanism 32 for the rear leg auxiliary frame are slidably fitted into the slide tubes 28 and 29. There is one lock groove (hole) 37 of the pin lock mechanism 30 of the front leg auxiliary frame, and a wire (not shown) for its removal is connected to the rear lever 34. As shown in FIG. 2, the front leg frame pin lock mechanism 31 and the rear leg auxiliary frame pin lock mechanism 32 have a locking groove 37 formed at respective positions. The front lever 33 and the rear lever 34 are connected to each other by a wire 35 or a wire 36 for removal from the respective lock grooves.

  FIG. 3 is an enlarged perspective view of a portion where the spring member 22 on the back surface of the upper frame 11 of the stretcher 100 of the present invention is attached. A state is shown in which one end of the spring member 22 of the front leg auxiliary frame is fixed to the distal end side of the rectangular frame-shaped upper frame 11 and the other end is attached to the pin lock mechanism 30 of the front leg auxiliary frame. A spring member cover 25 is attached to the spring member 22 of the front leg auxiliary frame to prevent the metallic noise generated by the spring member when the spring is extended or contracted. Further, the spring member is prevented from hitting the center rail 14 or the like of the stretcher and making a metal sound. Further, as shown in FIG. 1, the spring member is installed between the front leg auxiliary frame and the pin lock mechanism 30 of the front leg auxiliary frame, the rear of the pin lock mechanism 30 of the front leg auxiliary frame, and the pin lock mechanism 31 of the front leg frame. The spring member 24 with the spring cover 25 mounted between the pin lock mechanism 32 of the rear leg auxiliary frame and the rear leg frame 18 may be attached to the rear leg auxiliary frame 19.

  As shown in FIG. 4, the spring members 22, 23, 24 used in the present invention were SWP-B tension coil springs having a wire diameter of φ1.6. The tension coil spring has a thickness of φ14, and three types of springs with a length of 325 mm (a), 245 mm (b), and 200 mm (c), with a spring cover attached, are attached from the front end of the upper frame. It was installed between the pin lock mechanism 30 of the front leg frame and between the pin lock mechanism 31 of the front leg frame from the back of the front leg frame lock mechanism 30. The spring member to which the spring cover is attached is not only the front leg part, but also from the upper end movable part of the rear leg auxiliary frame to the middle of the upper frame (near the rotating part of the rear leg frame of the inner frame 13, see FIG. 2). A spring fixing member may be attached and a spring member with a spring cover attached may be attached. In this case, when the spring member 24 having a spring cover is attached between the fixing member and the rotating portion of the pin lock mechanism 32 of the rear leg auxiliary frame, the rear leg frame is expanded and returned to the original position. Reduce the load.

  The spring member used here can use a total of three springs, one for the front leg auxiliary frame and two springs having the same output for the front leg frame and the rear leg auxiliary frame. . The spring member to be used has different spring outputs depending on the wire diameter, material, and thickness, and is not limited to the above. The spring member has a wire diameter of φ1.0 to 3.0, a thickness of φ10 to 30, and a length of A spring of 150-350 mm can be used. The length of the spring varies depending on the material, wire diameter, spring diameter, etc., and is not particularly limited. The material of the spring member is preferably a weather resistant and durable material and is not particularly limited.

  The size of the spring cover 25 that covers the tension coil spring is preferably a tube made of synthetic resin having such a thickness that the spring is inserted and the spring does not rub against the inner surface of the cover. Further, the tube made of synthetic resin used for the spring cover 25 may be a hard tube or a flexible soft tube. Examples of the material of the tube include Teflon (registered trademark), nylon, urethane, silicon, vinyl chloride, synthetic rubber, natural rubber, and the like. A tube having weather resistance that can withstand long-term use is desirable. The material is not particularly limited.

  FIG. 5 is a partial perspective view of the rear leg frame 18 portion of the upper frame 11 having a rectangular frame shape. An inner frame 13 is attached to the upper frame 11, and a center rail 14 is attached thereon. A pin lock mechanism 31 for a front leg frame inserted into the front leg frame sliding tube 28 is attached to the front leg frame 15, and a front lever 33 is attached to the front leg 33 for operating the lock pin of the pin lock mechanism 31. A connected wire 35 is connected. When the front leg frame 15 is expanded by operating the front lever 33, the wire 35 is pushed and comes into contact with the internal frame 13, jumping out of the frame, or being caught by the movable part of the rear leg frame 18, causing an accident. Cause. Therefore, a bracket 39 with a corner is attached to the connecting portion between the upper frame 11 and the inner frame 13 to prevent the wire 35 from being caught between other portions.

  FIG. 6 shows a bracket 39 with a corner that is attached to a connecting portion between the rectangular frame-shaped upper frame 11 and the inner frame 13. A top view of the bracket 39 is shown in FIG. A portion 39a that is attached to the upper frame 11 and a portion 39b that is attached to the inner frame 13, and the portion 39c that is on the inner side of the frame prevents the wire 35 from being caught in the connecting portion of the upper frame 11 and the inner frame 13. It has a structure that eliminates the right-angled part. As shown in FIG. 6B, the side surfaces indicate a surface 39a fixed to the upper frame 11 of the stretcher and a surface 39b fixed to the inner frame 13, and 39c indicates the upper portion of the bracket 39.

  FIG. 7 shows one of pin lock mechanisms 30, 31, and 32 for moving the stretcher 100 up and down and fixing it at an arbitrary position. In the pin lock mechanism 31, a lever 33 (see FIG. 2) at one end of the stretcher 100 and a wire 35, and a lever 34 (see FIG. 2) and a wire 36 are connected. By pulling the front and rear levers 33 and 34, the wires 35 and 36 are pulled, the respective lock pins 37 are released from the lock grooves 38, and the stretcher 100 is movable up and down. When the front and rear levers 33 and 34 are released at an arbitrary position, the respective lock pins 37 engage with the lock grooves 38 and the stretcher 100 is fixed at the arbitrary position. A lock groove 38 for receiving and locking the lock pin 37 is formed in the front leg frame sliding tube 28 or the rear leg auxiliary frame sliding tube 29 (not shown) as shown in FIG. 7 (7-1). Has been. The lock groove 38 formed in the front leg frame sliding tube 28 or the rear leg auxiliary frame sliding tube 29 (not shown) has an acute angle on the side where the load is applied so that the load can be sufficiently received. Further, the side from which the lock pin 37 comes out is tapered so that the lock pin 37 is easy to come off. If the angle on the side from which the lock pin 37 is pulled out is deepened, the lock pin 37 can be engaged with the lock groove 38 only by lifting the stretcher without operating the front and rear levers of the stretcher. The lock groove 38 is not a groove, but may be a hole with which the lock pin is engaged. The lock groove 38 may have any shape that allows the lock pin to be easily removed and pulled out against unexpected loads. Is not limited to grooves.

  FIG. 7 (7-2) shows the pin lock mechanisms 30, 31, and 32 in a state of being inserted into the front leg frame sliding tube 28 or the rear leg auxiliary frame sliding tube 29 integrated with the front leg auxiliary frame sliding tube. One aspect of it is shown. For example, the roller 31d of the pin lock mechanism 31 receives the center rail 14, and the roller 31e receives the front leg frame sliding tube 28 or the rear leg auxiliary frame sliding tube 29 integrated with the front leg auxiliary frame sliding tube. ing. By providing the roller 31e, the vibration of the pin lock mechanism 31 is reduced.

  Similarly, when the pin lock mechanism 31 is represented by the pin lock mechanism 31 as a representative, as shown in FIG. 8, the front of the pin lock mechanism 31 is inserted into the holes 31a on both sides of the front leg frame sliding tube 28. The front leg frame sliding tube 28 is inserted into the hole 31a, and the pin lock mechanism 31 of the front leg frame slides back and forth. An emergency lever 31b is attached to the lower center of the pin lock mechanism 31, and the lock pin 37 can be released in an emergency. The wire connecting portion 31c on the side surface is connected to a lever 33 attached to the end of the stretcher with a wire 35. The upper roller 31d receives the center rail 14, and the lower roller 31e receives the front leg frame sliding tube 28, and holds the pin lock mechanism 31 stably.

  FIG. 9 shows a configuration diagram of a rotatable rear leg caster 21 and a caster fixing brake 40 for fixing the caster. A link operating part 41 is attached to the upper part of the rotatable caster 21, and the support arm 43 and the end of the rear leg frame 18 are attached inside the link operating part 41. A fixed brake 40 is mounted on the shaft of the rotatable caster 21 and through the link operating part 41. The fixed brake 40 is actuated by a brake button 40a protruding from the upper part of the link operating part 41, and presses and fixes the tire of the rotatable caster 21. A spring member (40f, not shown) is urged to the brake button 40a, and the brake button 40a is normally in a released state. The brake button 40a may be circular or square, and the shape of the brake button 40a is particularly limited as long as the fixed brake 40 is operated by being pressed by the upper frame 11 when the front and rear legs are folded. Is not to be done. A foot brake 44 is attached after the rotatable caster 21, and the foot brake 44b presses and fixes the tire by stepping on the foot plate 44a.

  The components of the fixed brake 40 include a brake button 40a protruding from the head of the link operating unit 41, a hollow nut 40b in which a spring is urged under the brake shaft that transmits the force of the brake button 40a, and a hollow. A washer 40c for maintaining the tightening of the bolt 40b, a brake shaft sliding portion 40d, and a pressing portion 40e for pressing the tire are provided below the washer 40c. The brake shaft 40a and the brake shaft that transmits the force of the brake button 40a may be integrated as shown in the figure or may be separate. The structure is not particularly limited as long as the upper frame 11 can press the brake button 40a and the pressing portion 40e can press the tire.

  FIG. 10 shows a state where the brake button 40 a of the fixed brake 40 of the caster is pressed by the upper frame 11. When the brake button 40a of the caster fixed brake 40 protruding on the link operating portion 41 is folded, the upper frame 11 and the brake button 40a come into contact with each other when the upper frame 11 is at the lowest position. 40a is pushed and the pressing part 40e presses a tire. Thus, even if no brake operation is performed, when the upper frame 11 is lowered to the lowest position, the caster's fixed brake 40 is applied, and the patient can be safely placed on the stretcher without forgetting to apply the brake.

  FIG. 11 shows a conventional stretcher spring installation method. In the spring member of a conventional stretcher, one end of one spring (a) is connected to the front leg and the other end is connected to the front brace, and a roller (b) is attached therebetween. Thus, the middle part of the spring is attached so as to be bent by the roller (b). Since the spring (a) is used to be bent by the roller (b), there is a problem that the spring (a) breaks from the portion in contact with the roller (b).

100: Invention stretcher 11: Upper frame 12: Fixed caster 13: Internal frame 14: Center rail 15: Front leg frame 16: Front leg auxiliary frame 17: Front leg caster 18: Rear leg frame 19: Rear leg auxiliary frame 20: Rear auxiliary Leg frame 21: rear leg caster 22: front leg auxiliary frame spring member 23: front leg frame spring member 24: rear leg auxiliary frame spring member 25: spring cover 26: fitting groove attachment portion 27: sliding tube 28: front leg frame Sliding tube, front leg auxiliary frame sliding tube 29: rear leg auxiliary frame sliding tube 30: front leg auxiliary frame pin lock mechanism 31: front leg frame pin lock mechanism 32: rear leg auxiliary frame pin lock mechanism 33: front lever 34: Rear lever 35: Front leg frame pin lock mechanism operation wire 36: Rear leg auxiliary frame pin ring Click mechanism operating wire 37: lock pin 38: the lock groove 39: Bracket 40: Caster fixed brake 41: Link movable portion 42: caster shaft 43: support arm 44: the foot brake

Claims (3)

A rectangular frame-shaped upper frame and an inner frame attached to the inner side of the upper frame, a center rail having a U-shaped cross section in the inner frame, a sliding tube on one side of the center rail, and a lock groove on the other side The front leg auxiliary frame pin lock mechanism, the front leg frame pin lock mechanism, and the rear leg auxiliary frame pin lock mechanism are slidably inserted into the slide pipe. A rear leg auxiliary frame is rotatably mounted on the pin lock mechanism with a front leg auxiliary frame, a caster at the lower end, and a rear leg auxiliary frame, and the inner frame has a rotatable caster at the lower end. A leg frame is rotatably attached, the front leg frame is expandable forward and rearward, and the rear leg frame is expandable rearward, and the upper end of the front leg frame is rotated. Stretcher, characterized in that are clamped by the spring member in at least two places of the upper end pivot portion of the front leg auxiliary frame and. The stretcher according to claim 1, wherein the spring members attached to at least two places are spring members to which a spring cover is attached. A fixed brake that fixes the wheels of the caster is installed on the link operating part from the top of the pivotable caster attached to the lower end of the rear leg auxiliary frame, and the upper frame is The brake button of the fixed brake which protruded on the link operation part contacts, and an upper frame presses a brake button, A brake is applied to the caster which can rotate freely, Either of Claim 1 or Claim 2 characterized by the above-mentioned. Stretcher as described in

Images